RFR: 8253375: OSX build fails with Xcode 12.0 (12A7209)

[Kim Barrett]

On Thu, 24 Sep 2020 21:28:01 GMT, Paul Hohensee <phh at openjdk.org> wrote:

> Please review this small patch to enable the OSX build using Xcode 12.0.
> 
> Thanks,
> Paul

src/java.desktop/macosx/native/libawt_lwawt/awt/CSystemColors.m line 129:

> 127:     NSColor* result = nil;
> 128:
> 129:     if (colorIndex < ((useAppleColor) ? sun_lwawt_macosx_LWCToolkit_NUM_APPLE_COLORS :
> java_awt_SystemColor_NUM_COLORS)) {

This looks like a plain old bug fix, nothing really to do with the compiler upgrade.  The new compiler presumably just
has a new warning that brought attention to the problem.  As such, I don't think it belongs in a PR that's about issues
related to the compiler upgrade.  Someone might want to backport just this fix, for example.

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PR: https://git.openjdk.java.net/jdk/pull/348